Clamshell bucket



D. FERRY.

CLAMSHELL BUCKET.

APPLICATION FILED FEB. 21. 1921.

Patented Jan. 24, 1922.

2 SHETSSHEET I.

D. FERRY.

CLAMSHELL BUCKET.

APPLICATION FILED FEB-2|. 1921.

Patented Jan. 24, 1922.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

CLAMSHELL BUCKET.

Application filed February 21, 1921.

To all whom it may concern Be it known that I, DANIEL FnrmY, a citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and tate of Pennsylvania, have invented a new and useful Improvement in Clamshell Buckets; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to clam shell buckets.

The object of my invention is to provide a simple and eflicient bucket of this character which is operated by a single rope, thereby doing away with the complicated mechanism ordinarily heretofore employed in operating buckets of this character.

To these ends my invention comprises the novel features hereinafter set forth and claimed.

In the drawings, Fig. 1 is aside sectional elevation of my improved bucket, showing the bucket halves open and the parts in position to close the bucket by the lifting of the cable; Fig. 2 is a like view showing the bucket halves closed; Fig. 8 is a like view showing the locking dog released so that on the lifting of the cable the bucket halves will'open; and Fig. 41 is a like view showing the halves open to release the load.

In the drawings the numeral 2 designates a suitable frame with the downwardly eX tending arms 3 which are pivotallv connected to the bucket halves 4 at 5. ounted in the frame 2 is the guide frame 6 with the vertical extending slot or guide 7. Secured to the lower end of the guide. frame 6 is the shroud 8. Passing through said shroud 8 is the shaft 9 which is connected up to the bucket halves by the straps 10 pivotally connected to the ends of said shaft which are rounded, although the main portion of said shaft is square.

Mounted within the shroud 8 is the rod 11 extending transversely of said shroud and parallel to the shaft 9.

Mounted in the guide 7 of the guide frame 6 is the carriage 12 throu h which the guide pin 13 passes moving in the guide 7.

Mounted on a. pin 14 on the carriage 12 is the locking dog 15, said lockin dog having the hook portion 16 which is a apted to engage the pin 11.. The dog 15'has the weighted portion 17 which tends to throw the book 16 into engagement with the pin 11 under normal conditions. The locking dog 15 has the arm 18 which is in the path of move- Specification of Letters Patent.

Patented Jan. 24, 1922.

Serial No. 446,668.

ment of the weight 19 pivotally mounted at 20 on the frame 2, said weight acting to re lease said dog from the pin 11 in the manner more fully hereinafter set forth.

Mounted on the carriage 12 are the sheaves 21 around which the cable 22 passes, the free ends of said cable being secured to the bars 23 on the frame 2. The loop portion 2a of the cable 22 passes up through an opening in the upper end of the guide frame 6 en gaging the idle friction rollers 25 to relieve the wear; on said cable when the frame swings. The loop 24 engages the pulley 26 in the pulley block 27 to which the main opcrating cable 28 is secured.

The lower end of the carriage 12 has the semi-circular recess 29 formed therein which engages the pin 11, there being a certain amount of play between said pin and said carriage. so that when said carriage is lowered slightly the hook portion 16 of the dog 15 will be lowered below the center .of said pin to permit the disengagement of said hook by the weight 19. By referring to 2 it will be observed that the slight lowering of the cable 28 will lower the carriage 12 until space 30 is taken up, as shown in Fig. 3, whereupon the weight 19 acts to throw the dog out of looking engagement with the pin 11.

In the operation of my improved bucket where it is desired to lift a load of coal, gravel or other material, the bucket is low cred, as shown, into the position shown in 1 Fig. 4 until the bucket halves come in contact with the material to be lifted, whcreupon by lowering on the cable 28 the carriage '12 is lowered to the position indicated in Fig. 1 with the hook 16 of the dog 15 engaging the pin 11. An upward movement is then applied to the cable 28 and the carriage 12 is lifted, and at the sametime the guide frame 6 rises and the bucket halves are gradually closed until they assume the position indicated in Fig. 2 with the material contained therein. The bucket is then moved to the unloading position, whereupon the cable 28 is lowered until the bucket rests upon the pile of material orthe ground, as indicated in Fig. 3, whereupon by lowering slightly on the cable 28 the carriage 12 is lowered until it rests upon the pin 11, as shown in Fig. 3, which lowers the hood beyond the central point of the pin 11, while at the same time the weight 19, which has been held up by the locking dog 15, is free ing of the bucket halves.

What I claim is:

1. In a clam-shell bucket, the combination with the frame, of the bucket-halves supported thereby and pivotally mounted for opening and closing, a guide-frame connected to saidbucket-halves, a vertical movable carriage on said guide-frame, a cable, connections between said cable and said carriage, a swinging-dog onsaid carriage, an abutment on said carriage with which said 'dog is adapted to engage, and means operative by the lowering of'said cable to release said dog. I

.2. In a clam-shell bucket, the combination with the frame, of the bucket-halves supported thereby and pivotally mounted foropening and closing, a guide-frame connected to sa1d bucket-halves, a vert1cal movable carriage on'said guide-frame, a cable, connections between said cable and said carriage, a Weighted swinging-dog on said carriage, an abutment on said carriage with which a hook formed on said dog is adapted to engage, and a pivotally mounted weight on said first-named frame in the path of said dog, whereby when said cable is lowcred said weight throws said dog out of engagement with said abutment.

3. In aclam-shell bucket, the combination with the frame of the bucket-halves supported thereby and pivotally mounted for opening and closing, a guide-frame connected to said bucket halves, a vertically movable carriageon said guide-frame, a swinging dog on said carriage, an abutment on said carriagewit-h which said dog is adapted to engage, sheaves on said, carriage, a cable passing around said sheaves, the free ends thereof connected to said first-named frame, a cable connected to said first named cable, and means operative by the lowering of said last-named cable to release said dog.

In testimony whereof, I, the said DANIEL FERRY, have hereunto set my hand. f

- DANIEL FERRY.

l Vitnesses: 7

Boer. D. To'r'rnrr, JOHN F, Wren. 

